package com.sky.controller.user;

import cn.hutool.json.JSONUtil;
import com.aliyuncs.utils.StringUtils;
import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate<String, String> redisTemplate;
    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        //从缓存中查菜品
        //构造redis中的key
        String key = "dish_" + categoryId;
        String redisDish = redisTemplate.opsForValue().get(key);
        //判断缓存菜品是否为空
        if(StringUtils.isEmpty(redisDish)){
            log.info("缓存中无菜品数据，从数据库查询");
            log.info("根据分类id查询菜品：{}", categoryId);
            List<Dish> dishList = dishService.getByCategoryId(categoryId);
            List<DishVO> list = dishService.listWithFlavor(dishList);
            //存入缓存
            redisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(list));
            return Result.success(list);
        }
        log.info("从缓存中查询菜品数据");
        List<DishVO> list = JSONUtil.toList(redisDish, DishVO.class);
        return Result.success(list);
    }
}
